<template>
    <div>
        <div class="search">
            <input v-model="keyword" type="text" class="search-input" placeholder="输入城市名或拼音">
        </div>
        <div class="search-content" ref="search" v-show="keyword">
            <ul>
                <li
                    class="item-city border-bottom"
                    v-for="item of list "
                    :key="item.id"
                    @click="handleCityClick(item.name)"
                >
                    {{item.name}}
                </li>
                <li class="item-city border-bottom" v-show="hasNodata">没有找到匹配内容</li>
            </ul>
        </div>
    </div>
</template>
<script>
import Bscroll from 'better-scroll'
import { mapMutations } from 'vuex'
export default {
    name:'CitySearch',
    props:{
        cities:Object
    },
    data (){
        return{
            keyword:'',
            list:[],
            timer:null
        }
    },
    computed:{
      hasNodata (){
          return !this.list.length
      }
    },
    watch:{
        keyword (){
            if(this.timer){
                clearTimeout(this.timer)
            }
            if(!this.keyword){
                this.list = []
                return
            }
            this.timer = setTimeout(() =>{
                const result = [];
                for(let i in this.cities){
                    this.cities[i].forEach((value)=>{
                        if(value.spell.indexOf(this.keyword) > -1 || value.name.indexOf(this.keyword) > -1){
                            result.push(value)
                        }
                    })
                }
                this.list = result
            },100)
        }
    },
    methods:{
        handleCityClick (city){
            this.changeCity(city);
            this.$router.push('/')
        },
        ...mapMutations(['changeCity'])
    },
    mounted(){
        this.scroll = new Bscroll(this.$refs.search)
    }
}
</script>
<style lang="stylus" scoped>
    @import "~styles/varibles.styl"
    .search
        height: .72rem
        padding:0 .1rem
        background:$bgColor
        .search-input
            box-sizing: border-box
            width: 100%
            height:.62rem
            padding:0 .1rem
            line-height: .62rem
            border-radius:.06rem
            text-align:center
            color:#666
    .search-content
        overflow:hidden
        z-index:1
        position:absolute
        top:1.58rem
        left: 0
        right: 0
        bottom: 0
        background: #eee
        .item-city
            line-height: .62rem
            padding-left:.2rem
            color: #666
            background: #fff
</style>